Exhaust arrangement for steam ejectors



Nov. 27, 1923.

M. LEBLANC EXHAUST ARRANGEMENT FOB STEAM EJECTORS kmwkm k Patented Nov. 27, 1923.

iJtTE rte.

MAURICE LEBLANC, OF PARIS, FRANCE, ASSTGNOB T STE. ANONYME POUR LEX- PLOI'IATION DE IPRQCEDES VIESTINGHOUSE LEBLANC, OE PARIS, FRANCE.

Application filed October 27, 1916. Serial No. 128,012.

To all whom it may concern Be it known that I, MAURICE LEBLANC, a citizen of France, residing at Paris, France, have invented certain new and useful Improvements in Exhaust Arrangements for Steam Ejectors, of which the following is a specification.

When steam ejectors are employed to extract and compress gases, it is, in most 1 cases, desirable to condense the residual steam which issues from the ejector. If, for example, in a steam engine installation having a condenser for condensing the steam from the engine, an ejector is employed as a vacuum pump for extracting the air and non-condensab'le gases from the condenser, it is advantageous to cause the ejector to exhaust into the feed water tank for the boilers. Where the condenser is a surface condenser, the ejector is arranged to exhaust into the discharge pipe for the con densate. The steam from the ejector is thereby condensed, the water and the heat from the condensation of the exhaust steam from the ejector being, at the same time, re-

covered.

The steam at the exit of the ejector always possesses a certain residual velocity; when the ejector discharges directly into water, shocks are caused which give rise to disagreeable noises, and which occasionally interfere with the regularity of action of the apparatus, especially in the case of an ejector having a high ratio of compression of the type described in United States Patent No. 1,175,461, dated March 14, 1916.

This disadvantage is avoided by the em ployment of the means, embodiments of which are shown in the accompanying drawings, wherein Figure 1 is a view in section of the combination constituting the invention. Figure 2 is a sectional view of another form of condenser connected with the exhaust from the ejector. In Figure 1,

46 A designates an ejector of any suitable kind having an inlet a for steam, and inlet a connected with a condenser or other receptacle from which gas or the like is to be removed and a is an outlet connected with a 50 device or condenser B by means of which the residual steam from the ejector is introduced into a body or tank of water, and condensed therein in a relatively constant manner, whereby fluctuations in the state of vacuum in the outlet a and ejector A are suppressed or practically minimized.

The device Bmay be in the form of. a shell (Fig. 1),pierced with holesd parallel to the axis of the said shell. In this manner, the velocity of the steam is substantially uniform at all points of the device B, the paths of the exhaust jets are free, a very energetic circulation of the water is established at the. exhaust point of the steam in the water, and, at the same time, the steam does not produce any sensible noises or shocks in the condensation tank, and the vacuum has perfect stability, however high it may be.

Finally, as shown in Fig. 2, the ejector A may be arranged to discharge into a feed tank 8 enclosing a water jet condenser B of the Korting type serving as the escapement of the ejector. This apparatus consists, as is known, of radially converging passages u, in the portion '0' of a tube 2), surrounded by a steam jacket '0 the two ends of which tube were submerged in the water of condensation. The steam from the ejector A enters the condenser B through the inlet 1* in the jacket '0 and through the passages uinto the tube 12, there mixing with the water in contactwith which it is condensed, giving up its vis viva to the water, and communicating thereto, in consequence, a movement 85 which insures the circulation of the water. in the direction of the arrow 'w through the tube '0.

In this manner, shocks, and noises are avoided, and, at the same time, a certain vacuum is produced at the discharge of the ejector. The ratio of compression is thus reduced,- and consequently the consumption of steam, the regularity of action of the ejector being, at the same time, increased.

I claim- 1. Apparatus for stabilizing an ejector having a high ratio of compression and acting as the air pump of a condenser, this apparatus comprising a perforated member 100 adapted to engage the end of the discharge tube of the ejector, a reservoir into which said discharge tube ext-ends, said perforated member being situated coaxially with said tube and the perforations in said member being so disposed that the jets of vapor cs- Q V V 1,475,4e1

caping through these perforations have subof, whereby a suitable circulation of the Wastantially the same direction. ter in the said tank is obtained.

2. An apparatus as described, comprising In Witness whereof I have hereunto signed a condenser, a steam ejector for the dis my name in the presence of two subscribing 5 charge of the air a feed Water tank and an Witnesses. V

ogival perforated member disposed at the MAURICE LEBLANC. end of the discharge passage of the said Witnesses:

ejector and immersed in the tank, the said CEAs. P. PREssLY,

ogival member havingformed therein a plu- EMILE BERTRAND.

10 rality of apertures parallel to the axis there 

